Drugs Affecting Cardiovascular System

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Questions and Answers

What is the primary function of a diuretic?

  • To promote the retention of electrolytes
  • To decrease hydration levels in the body
  • To increase the production of urine (correct)
  • To stimulate the absorption of water

Which electrolyte is specifically mentioned as being excreted due to diuretic use?

  • Ca2+
  • Na+ (correct)
  • Mg2+
  • K+

What term describes the obstruction caused by a withdrawing group such as NO2?

  • Electrostatic repulsion
  • Hydrophilic interaction
  • Steric hindrance (correct)
  • Chemical stability

What happens to cAMP levels when platelet aggregation increases?

<p>cAMP levels decrease (B)</p> Signup and view all the answers

Which of the following is a result of diuretic action?

<p>Decreased blood pressure (B)</p> Signup and view all the answers

Which group is considered a withdrawing group that could influence steric hindrance?

<p>NO2 (A)</p> Signup and view all the answers

Which drug replaced ticlopidine to reduce the risk of neutropenia?

<p>Clopidogrel (A)</p> Signup and view all the answers

How does an increase in cAMP affect platelet aggregation?

<p>It inhibits platelet aggregation (D)</p> Signup and view all the answers

In the pathway described, what is the effect of decreased cAMP on vasodilatation?

<p>Vasodilatation is diminished (D)</p> Signup and view all the answers

What is the result of reversing the described pathway involving platelets and cAMP?

<p>Increased platelet aggregation and cAMP (D)</p> Signup and view all the answers

What effect does the substitution of a benzene ring by an electron-donating group (ED) have on anticancer activity?

<p>It increases anticancer activity. (C)</p> Signup and view all the answers

How does the substitution of a benzene ring by an electron-withdrawing group (EWD) affect its anticancer activity?

<p>It decreases anticancer activity. (B)</p> Signup and view all the answers

Which statement accurately reflects the influence of substituents on anticancer activity in the order of effectiveness?

<p>ED on aromatic &gt; Aliphatic &gt; Aromatic &gt; EWD on aromatic (C)</p> Signup and view all the answers

Which scenario is likely to yield the highest anticancer activity?

<p>A compound with ED substitution on a benzene ring. (C)</p> Signup and view all the answers

What is the general trend in the anticancer activity due to substituents on aromatic compounds?

<p>ED enhances activity more than EWD decreases it. (B)</p> Signup and view all the answers

What is a primary use of the drug mentioned besides treating cancer?

<p>Treating rheumatoid arthritis (B)</p> Signup and view all the answers

Which statement accurately describes a virus?

<p>It is an obligatory intracellular parasite. (D)</p> Signup and view all the answers

What role do antiviral drugs play in relation to viruses?

<p>They inhibit the replication of viruses. (A)</p> Signup and view all the answers

Which of the following best describes the interaction between a virus and a host cell?

<p>The virus uses the host cell's machinery for its replication. (D)</p> Signup and view all the answers

What condition is a virus NOT responsible for treating with antiviral drugs?

<p>Rheumatoid arthritis (A)</p> Signup and view all the answers

What effect do electron donating groups (ED gp) have on Nitrogen in the context of Aziridinium cation formation?

<p>They stabilize and fix the lone pair of Nitrogen. (B)</p> Signup and view all the answers

How do electron donating groups influence anticancer activity?

<p>By increasing Aziridinium cation formation. (B)</p> Signup and view all the answers

What is the primary role of lone pairs of Nitrogen in the context of Aziridinium cation stabilization?

<p>They facilitate the bonding of Aziridinium. (D)</p> Signup and view all the answers

Which of the following best explains the relationship between electron donating groups and Aziridinium cations?

<p>ED groups fixate lone pairs, enhancing cation formation. (C)</p> Signup and view all the answers

What consequence does the stabilization of Nitrogen's lone pair have on anticancer compounds?

<p>It enhances the efficacy of anticancer activity. (C)</p> Signup and view all the answers

What role do M2 channels play in the virus's life cycle?

<p>They allow the acidification of the virus. (D)</p> Signup and view all the answers

What happens when M2 inhibitors are applied?

<p>The action of acidification is blocked. (B)</p> Signup and view all the answers

Which of the following is NOT a consequence of M2 channel activity?

<p>Prevention of viral replication. (A)</p> Signup and view all the answers

Which statement accurately describes the function of M2 channels in a viral infection?

<p>They allow protons to enter the virus. (B)</p> Signup and view all the answers

What is one immediate effect of blocking M2 channels in a viral context?

<p>Impaired viral uncoating. (D)</p> Signup and view all the answers

Flashcards

Diuretic

A substance increasing urine production by excreting water and electrolytes (like sodium and chloride).

Diuresis

Increased production of urine.

Steric hindrance

A molecular interaction where the presence of bulky substituents prevents certain reactions or interactions. Bulkiness prevents access.

Non-coplanar

Not in the same plane; molecules with different orientations.

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Withdrawing group (as NO2)

An atom or group that pulls electron density away from other parts of a molecule, affecting reactivity.

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Benzene ring substitution

Replacing a part of a benzene ring with another group.

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ED group

Electron-donating group, increases anticancer activity when substituted onto a benzene ring.

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EWD group

Electron-withdrawing group, decreases anticancer activity when substituted onto a benzene ring.

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Aromatic ring

A ring structure with specific bonding patterns called "aromaticity".

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Aliphatic ring

A ring structure that is not aromatic.

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Anticancer activity

The ability of a substance to kill or inhibit the growth of cancer cells.

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ED on Aromatic > Aliphatic > Aromatic > EWD

Electron-donating groups on aromatic rings generally have more anticancer activity and their activity decreases through aliphatic to aromatic and further more, to electron-withdrawing groups on aromatic rings..

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cAMP

A molecule that decreases platelet aggregation and promotes vasodilation.

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Platelet Aggregation

The clumping of platelets, promoting blood clotting.

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Vasodilation

Widening of blood vessels.

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Clopidogrel

A medication that prevents platelet aggregation by altering cAMP levels to reduce clot formation.

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Neutropenia

A condition where the number of neutrophils (a type of white blood cell) is abnormally low.

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Ticlopidine

An older antiplatelet drug replaced by clopidogrel due to a potential adverse effect.

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Electron donating groups (EDG)

Groups that release electrons, increasing electron density.

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Nitrogen lone pair

Unbonded electrons on the nitrogen atom.

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Aziridinium cation formation

Formation of a positively charged ring structure containing nitrogen.

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Anticancer activity

The ability to inhibit or kill cancer cells.

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EDGs and Aziridinium

Electron donating groups facilitate Aziridinium cation formation.

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Anti-cancer use

A medical application of something to fight cancer.

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Autoimmune diseases

Diseases where the body's immune system attacks its own tissues.

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Rheumatoid arthritis

An autoimmune disease causing inflammation in the joints.

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Antiviral drugs

Medicines used to treat viral infections.

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Obligatory intracellular parasite

A pathogen that needs to enter a host cell to replicate.

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Host cell

A cell that is infected or invaded by a pathogen.

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Virus replication

The process of viruses making copies of themselves.

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M2 channels

Protein channels that allow protons (H+) to enter a virus, acidifying it.

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Virus acidification

The process of making the inside of a virus more acidic by allowing protons to enter.

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Viral uncoating

The process of a virus releasing its genetic material (RNA) due to acidification.

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Viral replication

The process of a virus making copies of itself inside a cell.

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M2 inhibitors

Drugs that block the action of M2 channels, preventing virus acidification.

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Study Notes

Drugs Affecting Cardiovascular System (CVS)

  • Blood pressure (hypertension) is the force of blood against artery walls as the heart pumps blood.
  • Hypertension occurs when the force is stronger than normal.
  • Normal blood pressure is systolic >140 mmHg and/or diastolic >90 mmHg.

Anti-hypertensive Drugs

  • Subtype α1 (receptors):
    • Effect: Vasoconstriction (blood vessel constriction)
    • Organ: Peripheral blood vessels (arterioles)
  • Subtype α2 (receptors):
    • Effect: Decreases sympathetic outflow (reduces nerve signals)
    • Organ: Presynaptic neurons (CNS)
  • Subtype β1 (receptors):
    • Effect: Increases force and rate of contraction
    • Organ: Heart
  • Subtype β2 (receptors):
    • Effect: Bronchodilation (widening of bronchi)
    • Organ: Bronchi

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